Gebruiksaanwijzing /service van het product THS4503EVM van de fabrikant Texas Instruments
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THS4503EVM June 2002 HPL User ’ s G uide SLOU132.
IMPORT ANT NOTICE T exas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice.
EVM IMPORT ANT NOTICE T exas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EV ALUA TION PURPOSES ONL Y and is not considered by TI to be fit for commercial use.
EVM W ARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 5 V and the output voltage range of +5 V and –5 V . Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM.
Information About Cautions and Warnings iii Preface About This Manual This manual provides information about using the THS4503 fully differential amplifier on evaluation module PCB marked with Edge # 6439396.
Related Documentation From T exas Instruments iv This is an example of a warning statement. A warning statement describes a situation that could potentially cause harm to you . The information in a caution or a warning is provided for your protection.
T rademarks v - Application report (literature number SLMA002), Power Pad Thermally Enhanced Package , http://www−s.ti.com/sc/psheets/slma004/slma002.pdf - Application report (literature number SLMA004), Power Pad Made Easy , http://www−s.ti.com/sc/psheets/slma004/slma004.
vi.
Contents vii 1 Introduction and Description 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Description 1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents viii 1−1. Schematic of the Populated Circuit on the EVM (Default Configuration) 1-3 . . . . . . . . . . . . . . 2−1. Power Supply Connection for ± 5 Vdc 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 Introduction and Description The T exas Instruments THS4503 evaluation module (EVM) helps designers evaluate the performance of the THS4503 fully differential operational amplifier (FDA).
Description 1-2 1.1 Description The THS4503EVM provides a platform for developing high-speed FDA application circuits. It contains the THS4503 high-speed FDA, a number of passive components, and various features and footprints that enable the user to experiment, test, and verify various operational amplifier circuit implementations.
EVM Default Configuration 1-3 Introduction and Description 1.4 EVM Default Configuration As delivered, the EVM has a fully functional example circuit, just add power supplies, a signal source, and monitoring instrument. See Figure 1−1 for the default schematic diagram.
1-4.
2-1 Using the THS4503EVM !" This section describes how to connect the THS4503EVM to test equipment. It is recommended that the user connect the EVM as described in this section to avoid damage to the EVM or the THS4503 installed on the board.
Required Equipment 2-2 2.1 Required Equipment - One dual-output dc power supply ( ± 5 V , 1 A output minimum) - T wo dc current meters with resolution to 1 mA and capable of the maximum current the dc power supply can supply .
Function Generator Setup 2-3 Using the THS4503EVM 2.3 Function Generator Setup Note: The oscilloscope inputs 1 and 2 must be set to 50- Ω input impedance for proper results. 1) Connect the function generator to oscilloscope channel 1. 2) Se t vertical channels 1 and 2 of the oscilloscope to 0.
2-4.
3-1 THS4503EVM Applications !" # Example applications are presented in this chapter . These applications dem- onstrate the most popular circuits, but many other circuits can be constructed.
Single-Ended In/Single-Ended Out, Utilizing T ransformer 3-2 3.1 Single-Ended In/Single-Ended Out, Utilizing T ransformer The fully differential amp output can be monitored by a single-ended instrument at J4. The THS4503EVM utilizes Mini-Circuits CD542 footprint transformers to make the fully differential to single-ended conversion.
Single-Ended to Fully Differential Application 3-3 THS4503EVM Applications Figure 3−2. Single Supply Operation TP1 V ocm R1 56.2 W J3 V out − R5 392 W J2 V out+ J1 Vin − C2 R3 402 W R4 392 W +VS.
Single-Ended to Fully Differential Application 3-4 Figure 3−3. Output of an AC-Coupled, Single-Supply Application 3 2 1 0 −1 0 500 n 1 Ω t − Time − s V olts The designer should realize that the coupling capacitors, acting with the gain resistors, produce a high pass characteristic into the circuit.
4-1 High-Speed Amplifier PCB Layout Tips $ #%& '( )* The THS4503EVM layout has been designed for use with high-speed signals and can be used as an example when designing PCBs incorporating the THS4503.
4-2 Circuit pathways should be made as symmetrical as possible for both feedback pathways to minimize second and other even-harmonic content. The printed-circuit board used with PowerP AD packages must have features included in the design to remove the heat from the package efficiently .
5-1 EVM Hardware Description !" + This chapter describes the EVM hardware. It includes the EVM parts list, and printed circuit board layout. T able 5−1. THS4503EVM Bill of Materials Item Description SMD Size Reference Designator PCB Qty .
5-2 Item Distributor’s Part Number Manufacturer’s Part Number PCB Qty . Reference Designator SMD Size Description 17 Jack, banana receptacle, 0.25” diameter hole J5, J7, J8 3 (HH Smith) 101 (Newark) 35F865 18 Connector , SMA PCB Jack J1, J2, J3, J4, J6 5 (Amphenol) 901−144−8RFX (Newark) 01F2208 19 Standof f, 4−40 Hex, 0.
5-3 EVM Hardware Description Figure 5−2. Bottom Layer 2 (Ground and Signal).
5-4 Figure 5−3. Schematic Diagram C2 0 VCC+ C4 * R17 0 R8 340 Ω R5 392 Ω R13 * C10 * R3 402 Ω − V ocm + U1 THS4503 1 8 2 3 6 5 4 J8 +VS T1 ADP4 − 1WT 6 1 5 4 3 R2 374 Ω TP1 V ocm +VS − VS J6 Vin+ R12 * J1 Vin − C12 0.1 µ F TP4 C5 * TP5 R1 1 * R16 * R4 392 Ω J4 V out − VS C3 * R14 * R15 * C7 * + C8 6.
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